Flow characteristics of multiple round jets issuing from in-line nozzle arrangement
Flow characteristics of multiple round jets issuing from in-line nozzle arrangement
复制标题
直列式喷嘴排列发出的多个圆形射流的流动特性
DOI：
10.1007/978-981-10-7542-1_25
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Teramoto,H and Kiwata,T.
中科院分区：
文献类型：
--
作者：
Takaomi UTATSU;Mizue MUNEKATA;Hiroyuki YOSHIKAWA;Yasuhiro OKUMURA;Teramoto,H and Kiwata,T.
本文报道了在低雷诺数Re = 4 × 103条件下，在喷嘴间距比l/d= 1.5，2，3，4，5（其中l为喷嘴直径，l为喷嘴中心间距）的情况下，对6 × 6直列喷嘴多股圆射流流动特性的实验研究。用恒温型热线风速仪测量了射流的平均速度和脉动速度。结果表明，随着间距比的增大，射流的弯曲度减小。在更下游处，多股射流合并成单股射流，随着间距比l/d的增大，多股射流的合并发生在更下游处。在小间距比的情况下，融合射流的最大速度增大，融合射流从射流出口近区向外扩展。
This research reports on an experimental investigation of the flow characteristics of multiple round jets issuing from 6 × 6 in-line nozzle arrangement at low-Reynolds number,Re≈ 4 × 103, with five spacing ratios ofl/d= 1.5, 2, 3, 4 and 5 (wheredis a diameter of nozzle, andlis a spacing between the center of nozzles). The mean and fluctuating velocities of the jet flow were measured by constant-temperature type hot-wire anemometer. We found that the bending of the outside jet decreases with increasing the spacing ratiol/d. In the further downstream, the multiple jets merge into a single jet flow and the merging of multiple jets occur more downstream with increasing the spacing ratiol/d. In the case of the small spacing ratio, the maximum velocity of merged jet increases and the merged jet spreads from the near field of jet exit.